2728388188 has 12 divisors (see below), whose sum is σ = 4809030520. Its totient is φ = 1354379472.

The previous prime is 2728388171. The next prime is 2728388189. The reversal of 2728388188 is 8818838272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728388189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453031 + ... + 2454142.

Almost surely, 2^2728388188 is an apocalyptic number.

It is an amenable number.

2728388188 is a deficient number, since it is larger than the sum of its proper divisors (2080642332).

2728388188 is a wasteful number, since it uses less digits than its factorization.

2728388188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907316 (or 4907314 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 55.

The square root of 2728388188 is about 52233.9754183041. The cubic root of 2728388188 is about 1397.3398786722.

The spelling of 2728388188 in words is "two billion, seven hundred twenty-eight million, three hundred eighty-eight thousand, one hundred eighty-eight".